Knuckle for couplings.



No. 721,345. PATENTED PEB. 24, 1903..

KNUCKLE POR vGOUPLINGS.

APPLICATION FILED Dnc. f2, 1901.v

N0 MODEL. Y 3 SHEETS-SHEET l.

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No. 721,345. PATENTBD P14-"13.24, 190s.

"5. G. WASHBURN.

KNUCKLE PoR coUPLlNGs. APPLICATION FILED DEO. 2, 1901.

No MODEL. y A a SHEETS-BEBE; z.

/l l 4Z i neapolis, in the county of Hennepin and State UNITED STATESPATENT OFFICE.

EDWIN C. WASHBURN, OF MINNEAPOLIS, MINNESOTA.

KNUCKLE FOR coUPLlNGs.

SPECIFICATION forming part of Letters Patent No. 721,345, dated February24, 1903. Application iiled December 2, 1901. Serial No. 84.7391. (Nomodel.)

To all whom t may concern;

Be it known that l, EDWIN C. WASHEUEN, a citizen of the United States,residing at'Minof Minnesota, have invented certain new and usefulImprovements in Knuckles for Coup- 1ers; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My present invention has for its object to provide an improved knucklefor car-cou plers of the Master Car-Builders type; and it consists ofthe novel construction hereinafter described, and defined in the claims.

A knuckle constructed in accordance with my invention is illustrated inthe accompanying drawings, wherein like characters indicate like partsthroughout the several views.

Figure 1 is a plan view of the knuckle. Fig. 2 is an elevation of thesame looking at the same in the direction indicated by the arrow yzbnFig. 1. Fig. 3 is an elevation looking at the knuckle in the directionindicated by the arrow g3 on Fig. 1. Fig. 4 is an elevation looking yatthe knuckle in the direction by the arrow @/4 on Fig. 1. Fig. 5 is ahorizontal section through the knuckle, takenn on the irregular line x5x5 of Fig. 6; and Fig. 6 is a vertical section taken onfthe irregularline m6 006 of Fig. 5.

The knuckle is 'of course in the form of an integral casting, usually ofsteel. Of the parts of the knuckle the numeral 1 indicates the hub, thenumeral 2 the tail or shank, and the numeral 3 the bumping-head or outerend portion. The tail 2 carries a segmental pinsupporting flange 4, andthe projecting edge of the head 3 is, as is ordinary, divided or notchedto form ears 5, with ordinary pinseats 6. It is important to note thatthe tail or shank 2 tapers outward or, in other words, iiares inward andblends or runs into the hub 1 without forming an abrupt shouldertherewith, as is usually the case. In fact, this shank tapers outward onall four sides, so that it is given somewhat the form of a truncatedpyramid. Another feature of my invention is directed to the manner ofcoring out the interior of the knuckle. The hub 1 is at its interme-.scale thereof.

diate portion divided, so as to aord an eX- panded chamber 7, which isintersected by the pintle'- seat 8, which extends vertically through thesaid hub. The tail or shank of the knuckle is cored out t0 form atapered chamber V9, which follows as closely as possible the outline ofthe exterior of said tail or shank, and thereby forms the said tail Witha shell of approximately equal thickness. By a vertically-extended corethe bumping head or portion 3and portions of the ears 5 are cored out toforma chamber 10. (Best shown in Figs. 5 and 6.) The said chambers 7, 9,and 10 are all in communication and may be formed by a single core. Bythis chamber 10 ,the outer bumping portion or head of the knuckle, aswell as portions of the ears 5, are made of shell-like form incontradistinction to solid or block-construction. To reinforce thewalls. of the bumping head Vor section 3, endless reinforcing-ribs 11are run in horizontal planes withinthe chamber 10. Between the saidribsll the wall of the said section 3 is preferably thickened, asshown.at 12. The

. ribs 11 and 12 greatly stien the face or front wall of thebumping-head 3 and prevent the same from being indented.

Experience has shown that steel and malleable castings when cast hollowand properly ribbed are stronger than when cast solid. This isprobablydue to the fact that they are more Velastic and to thefurtherfact that the strongest part of the casting is the skin or HenceI believe the knuckle described to have increased strength and decreasedWeight..`

A single core or a core the parts of which are rigidly connected may beused to core out all of the cavities or recesses of the knuckle,including the pintle-seat 8. That portion of the core which forms thepintle-seat will, as is usual, project at its ends and be suitablyanchored in the sand. It therefore serves to keep all the portions ofthe core in proper alinement and relative position. At theeX- treme endof the knuckle-tail is shown a perforation 13, through which a portionof the core may project to assist in anchoring the core in properposition in the sand.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

1. A coupler-knuckle having its bumping head or end formed withvertically-spaced and l seat intersecting the intermediate portion ofperforated ears, and with said head and portions of said ears cored outby a cavity which extends into the body of the knuckle and is 5reinforced by an endless internal flange eX- tending in a horizontalplane, substantially as described.

2. A coupler-knuckle of the character described cast hollow by a cavityextending 1o throughout its tail or shank, bumping head or end andintermediate portion, and a pintlesaid cored cavity, whereby a single orrigid core may be employed, substantially as described.

In testimony whereof I alix my signature in presence of tngo witnesses.

EDWIN o. WASHBURN. i

Witnesses:

ELIZABETH KELIHER, F. D. MERCHANT.

